Perhaps you should try some spelling variations:
thieu khang » thieu quang
chieu khong » chien chong, chu khong, chieu duong
thieu sang » chieu sang, thieu quang, hieu lang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (((thieu khang) OR (chieu khong)))) - hanh trinh cua nhung cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (((thieu khang) OR (chieu khong)))) - hanh trinh cua nhung cong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (((thieu khang) OR (chieu khong)))) - hanh trinh cua nhung cong dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (((thieu khang) OR (chieu khong)))) - hanh trinh cua nhung cong dan than ban*.